Cover clamp



July 10, 1934. H.F KOLLINGER 1,965,898

COVER CLAMP 'Filed June 27, 1951 fi g-i may.

ATTORNEY.

Patented July 10, 1934 UNITED STATES PATENT OFFICE COVER CLAMP Application June 27, 1931, Serial No. 547,371

2 Claims.

This invention relates to cover clamps and more particularly to clamps for securing the covers on transformer tanks.

One of the prime objects of the invention is to design a rugged and practical cover clamp, and provide cooperating means on the cover so that the cover may be easily, quickly and firmly locked in position.

Another object is to provide a cover clamp of simple and economical construction, which can be formed of stampings, and which can be readily swung outwardly and clear of the cover so that the cover can be readily removed or replaced.

With the above and other objects in view, the

present invention consists in the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawing, and particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportion, and minor details of construction, without departing from the spirit, or sacrificing any of the advantages of the invention.

In the drawing:

Fig. 1 is a fragmentary side view of a transformer tank and cover with the clamp in position.

Fig. 2 is a top plan view.

Fig. 3 is an enlarged fragmentary sectional detail of the cover showing the boss stamped therein.

Fig. 4 is a detail side view of the clamp.

Fig. 5 is a top plan View thereof.

Fig. 6 is a side view of the lifting ear and hold down bolt.

:5 Fig. 7 is an end view thereof.

Referring now more specifically to the drawing, the transformer tank is indicated by the numeral 2, this can be of any preferred shape and is preferably formed of steel plate as usual.

0 A cover 3 forms a closure for the upper end of the tank, and raised bosses 4 are formed in said cover and for a purpose to be presently described.

Lifting ears 5 are welded to the body of the tank at a point adjacent the open end thereof 5 and are formed as clearly shown in Figs. 6 and 7 of the drawing, each ear comprising a section of plate bent substantially U-shaped, the bottom 6 thereof being closed, and projects downward at an angle with relation to the tank wall so that a good grip is provided, the ears project upwardly and are provided with suitable openings adaptedto accommodate a hold down bolt 7, the lower end 8 of which is T-shaped for pivotal mounting therein, the upper end being threaded and a wing nut 9 is threaded thereon.

The cover clamp 10 is also preferably a stamping, and is formed as shown in Figs. 4 and 5, the top and side walls 10 and 11 respectively being closed, and an opening 12 is provided in the top to accommodate the hold down bolt 7 which projects as shown at 14 to engage the raised boss provided on the cover, and it will be obvious that when the clamp is in position as shown in Figs. 1 and 2 of the drawing, that it will tightly and firmly lock the cover in position, and by backing off the wing nut a distance suflicient to permit the disengagement of the clamp from the boss that the clamp and hold down bolt can be swung clear of the cover, and as indicated in dotted lines in Fig. 1, the angled side wall 11 of the clamp permitting the clamp to freely swing downwardly.

While in the present instance I have shown the lifting ears and clamp formed of stampings, it will be clear that they may be cast if desired.

From the foregoing description it will be obvious that I have perfected a very simple, practical, and substantial cover clamp for securing covers in position.

What I claim is:-

1. The combination with a tank provided with a flat cover having a raised boss pressed on the edge thereof, U-shaped downwardly projecting lifting ears secured to said tank, a T-shaped hold down bolt pivotally secured between the side walls of said ears, a stamped clamp loosely mounted to rock on said bolt and provided with an overhanging jaw adapted to interlock with said boss, and a nut for securing said clamp in position.

2. The combination with a tank provided with a cover having raised bosses pressed on the edges thereof, outwardly and downwardly projecting lifting ears secured to the side walls of the tank, the bottom wall of the ears being closed and projecting downwardly at an angle, a hold down bolt pivotally secured between the side walls of'said cars, a hollow sheet metal clamp loosely mounted to rock on said bolt and formed with an overhanging jaw for engagement with one of said bosses, and a nut for securing said clamp in position.

HENRY F. KOLLINGER. 

